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Lithium ion battery cathode composite material and preparation method thereof

ActiveCN101916846AExtend your lifeCyclic stabilityCell electrodesGraphite substrateLithium electrode
The invention discloses a lithium ion battery cathode composite material and a preparation method thereof. The invention aims to lower the cost of the cathode material of the lithium ion battery and enhance the conductivity thereof. Graphite is used as the substrate of the material, and an organic polymer and/or high molecular conducting polymer are/is coated outside the substrate. The preparation method comprises the following steps: purifying or graphitizing natural crystalline flake graphite, microcrystal graphite, crystallized veined graphite or needle coke and petroleum coke to obtain the graphite substrate, mixing the graphite substrate and the organic high molecular polymer and/or high molecular conducting polymer liquid phase, spray-drying, and carrying out oven-drying to obtain the lithium ion battery cathode composite material. Compared with the prior art, the invention has the advantages of simplified technique, firmer and more compact coating layer, and stable circulation of the lithium ion battery; the powder resistivity is below 7*10<-6> omega m; and when the material is used for manufacturing the pole piece of the battery, the use amounts of adhesive and conducting agent are reduced in the pole piece manufacturing process, thereby lowering the battery cost.
Owner:BTR NEW MATERIAL GRP CO LTD

Efficient stirring device for flocking processing

The invention relates to a stirring device, in particular to an efficient stirring device for flocking processing, and aims at solving the technical problem of providing an efficient stirring device which is used for flocking processing and is high in stirring efficiency, low in cost and uniform in stirring.For solving the technical problem, the efficient stirring device for flocking processing comprises a support, a first motor, a connecting rod, a bottom plate, a rotating shaft, a barrel cam, a first clamping block, an arc-shaped connecting rod, a second clamping block, a lifting rod, a guiding rod, a guiding sleeve, an electromagnet, a thin film, an iron block, a screen board, a sliding block, a sliding rail, a stirring box and a first connecting rod; the top of the bottom plate is sequentially provided with the support, the guiding rod and the stirring box from left to right, the right wall of the support is sequentially provided with the first motor, the connecting rod and a guiding plate from top to bottom, the right end of the first motor is connected with the rotating shaft, the rotating shaft is provided with the barrel cam, and the barrel cam is provided with a milling groove.The efficient stirring device for flocking processing achieves the effects of being high in stirring efficiency, low in cost and uniform in stirring.
Owner:JIASHAN BOHUA FLUFF TRADING

System and method for controlling online type photovoltaic power generation microgrid without storage device

The invention discloses a system and a method for controlling an online type photovoltaic power generation microgrid without a storage device. The system comprises a photovoltaic component, a power controller, a grid-connected inverter system, a current detection device and a reverse-power protector, the photovoltaic component is connected with the grid-connected inverter system through the power controller, output of the grid-connected inverter system and grid current are connected to simultaneously supply power to load, the power controller enables a photovoltaic power generation system to be in a variable power output state and dynamically adjusts output power of the photovoltaic power generation system according to changes of the load, the current detection device detects magnitude and phase position of the grid current as current feedback control signals of the grid-connected inverter system, and the reverse-power protector is positioned between the microgrid and an outer grid to stop the microgrid from transmitting current to the outer grid. The system is free of a storage battery energy storage system, the outer grid is only a supplement when the microgrid is in power shortage, and power transmission to the outer grid is effectively avoided, so that effects of electricity saving can be realized without upgrading power transmission networks and power distribution networks, and popularization is facilitated.
Owner:SHANGHAI JIAO TONG UNIV
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